From: Michael Wu <flamingice@xxxxxxxxxxxx>
This prevents userspace and the in-kernel MLME from configuring
channel/BSSID/SSID at the same time when the in-kernel MLME is in the midst
of automatic AP selection. This is done by holding the RTNL lock.
Signed-off-by: Michael Wu <flamingice@xxxxxxxxxxxx>
---
net/mac80211/ieee80211_sta.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 0e9e4f9..04a63a7 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -2068,9 +2068,12 @@ static int ieee80211_sta_config_auth(struct net_device *dev,
struct ieee80211_sta_bss *bss, *selected = NULL;
int top_rssi = 0, freq;
+ rtnl_lock();
+
if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
!ifsta->auto_ssid_sel) {
ifsta->state = IEEE80211_AUTHENTICATE;
+ rtnl_unlock();
ieee80211_sta_reset_auth(dev, ifsta);
return 0;
}
@@ -2113,6 +2116,7 @@ static int ieee80211_sta_config_auth(struct net_device *dev,
ieee80211_sta_set_bssid(dev, selected->bssid);
ieee80211_rx_bss_put(dev, selected);
ifsta->state = IEEE80211_AUTHENTICATE;
+ rtnl_unlock();
ieee80211_sta_reset_auth(dev, ifsta);
return 0;
} else {
@@ -2123,6 +2127,7 @@ static int ieee80211_sta_config_auth(struct net_device *dev,
} else
ifsta->state = IEEE80211_DISABLED;
}
+ rtnl_unlock();
return -1;
}
-
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